Document that Mac bindings can only be built on a Mac

Would be great to document that Mac bindings can only be built on a Mac, and that Pair to Mac will not work.

Better if it could be documented which built files from the Mac need to be moved back over to Windows, and how to incorporate them into the solution.

Start by tracing the Mac binding build workflow and the Windows solution workflow described in the issue. Document the Mac-only limitation, explain why Pair to Mac does not work, identify which built files must move back to Windows, and describe how to add them to the solution.

索引モデルが issue の本文から書いたものです。